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Item of the Month: Dactylioceras Commune

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This month’s Item of the Month is an small and beautifully intricate fossil negative of a Dactylioceras Commune. This is often known as a ‘Whitby Ammonite’, referring to their significant numbers found at the beach of Whitby in Yorkshire.

A digital illustration of a Dactylioceras Commune. Source: NobuTamura email:nobu.tamura@yahoo.com www.palaeocritti.com, CC BY-SA 3.0, via Wikimedia Commons.
Above: A digital illustration of a Dactylioceras Commune. Source: NobuTamura email:nobu.tamura@yahoo.com www.palaeocritti.com, CC BY-SA 3.0, via Wikimedia Commons.

This particular fossil is less than 5cm in diameter and weighs just 42g, and therefore we’re lucky not only that it was found, but then later donated to our archive. Other examples of Dactylioceras Commune have shown that they can reach about 9-11cm in diameter.

Dactylioceras Commune negative fossil (Ref: LS2025.0600).
Above: A Dactylioceras Commune negative fossil, detailing the ribbing of its whorl. (Ref: LS2025.0600).

How old is Dactylioceras Commune?

It is estimated that these Dactylioceras Commune fossils are 180 million years old, and therefore make them amongst the oldest items in our archive.

Latest Acquisitions

Amongst our latest acquisitions, we have also received:

By Andrew Martin

Andrew Martin is the Digital Projects Manager at The Littleport Society, he works with the Archivists to digitise and catalogue our archive. He's also a Cambridgeshire family historian, and the host of The Family Histories Podcast.